diff --git a/Makefile b/Makefile
index 2eb7b30..c4dec95 100644
--- a/Makefile
+++ b/Makefile
@@ -108,6 +108,9 @@ $(NOSSP_SRCS:%.c=%.o) $(NOSSP_SRCS:%.c=%.lo): CFLAGS += $(CFLAGS_NOSSP)
 
 $(CRT_LIBS:lib/%=crt/%): CFLAGS += -DCRT
 
+$(patsubst %.c,%.o,$(wildcard src/complex/*.c)): CFLAGS += -fno-optimize-sibling-calls
+$(patsubst %.c,%.lo,$(wildcard src/complex/*.c)): CFLAGS += -fno-optimize-sibling-calls
+
 # This incantation ensures that changes to any subarch asm files will
 # force the corresponding object file to be rebuilt, even if the implicit
 # rule below goes indirectly through a .sub file.